Hello Sir,
If you see my testing project which I have attached with my 1st post you will see that I have already applied it but it is showing in the way I want to do, the example link given by you has repetation of the attendees in the 2nd column after room no but in my case the roomno will not repeat as one room cannot be present in 2 different roomtypes, so please look through my project once and guide me if possible.